Coating-machine.



C. E. ARNOLD.

COATING MACHINE. APPLICATION FILED DEC-l1. |914-l RENEWED AUG- 5, 1911.

Patented Mar. 12, 1918.

2 SHEET uur l. rJZ

c.E.ARN0LD. COATING MACHINE.

APPLICATION FILED DECNII. I9I4- RENEWED AUG. 6. 1911.

1 ,259,339. Patented Mar. 12, 1918.

2 SHEETS-SHEET 2.

41 .5 vw@ w60@ CHARLES ELWOOD AENOLD, OF WILMINGTON, DELAWARE,ASSI'GNOB, 'lO I. DU PONT DE NEMOURS PQWDEE COMPANY, OF WLMINGTON,DELAWARE, A CORPORATION OF NEW JERSEY.

@DATING-MACHINE.

)Patented Mar. 112, i913.

Application iled December 17, 1914, Serial No. 877,643. Renewed August6, 1917. Serial No. 184,779.

To all wlw/m, t may concern:

Be it known that I, CHARLES ELwooD ARNOLD, of Wilmington, in the countyof New Castle, and in the State of Delaware, have invented a certain newand useful Improvement in Coating-Machines, and do hereby declare thatthe following is a full,

f 22, which are keyed to the shaft by means of .removable keys 2.3, saidgears 20, 21 and 22 clear, and eXact description thereof.

My invention relates particularly to an improvement in method andapparatus for producing pyroXylin coated fabrics, but more especiallywoven fabrics carrying a coating or layer of a pyroXylin composition.

The object of my invention is to provide an apparatus for producing aproduct in which the layer of pyroxylin carried bythe fabric will bevery eectively and securely anchored on the fabric, and in which thecoating composition will adhere in an eective manner thereto. A furtherobject of my invention is to provide an apparatus for producingpyroXylin coated fabrics in which the coating composition will dry andharden in a uniform manner, and which will therefore be tough and ofsuch a nature that it can be subjected to strains to a considerabledegree without risk or damage.

While my invention is capable of embodiment in many diderent forms, forthe purpose of illustration l have shown only one` form thereof in theaccompanying drawings, in which- Figure 1 is a front elevation of amachine made in accordance with my invention;

F ig. 2 is a side elevation of the same;

Fig. 3 is a plan view of a detail of they roll on which the coatedfabric is wound.

Fig. 4 is an end elevation in detail of a shaft on which the fabric iscarried when being fed `into the machine.

Fig. 5 is an end elevation of one of the wooden shuttles used forcarrying the fabric;

Fig. 6 is an end elevation of one of the gears; and

Fig. 7 is a plan view of the guide plates for feeding the jelly upon theweb of fabric.

In the drawings 1 have shown a machine having a main frame 1, in whichthere are carried three rolls 2, 3 and 4. These rolls 2, 3 and 4 arecarried upon shafts 5, 6 and 7, respectively. rflue shaft 6 of themiddle roll 3 is maintained in a fixed -position in the main frame 1.The shafts 5 and 7, however, are supported in vertically movable boxes 8and 9, which are adapted to be adjusted by mea-ns of screws 10 and 11,supbeing all of the same size. Upon the other end of the said shafts 5,6 and 7, are carried gears 24, 25 and 26, the gear 25 being smaller thanthe gears 24 and 26, and said gears being keyed to their respectiveshafts in a similar manner to the gears 20, 21 and 22. Only one of thesesets of gears is used at a given time. When the gears 20, 21 and 22 areused the keys are removed from gears 24 and 26, and when the gears 24,25 and 26 are used the keys are removed from the gears 2O and 22. Thegears 20, 21 and 22 are used when it is desired to have the rolls 2, 3and 4 moved at thesame speed, and the gears 24, 25 and 26 are used whenit is desired to have the top and bottom rolls move slower than themiddle roll. The central shaft 6 is extended at the one end of themachine so as to carry a large gear 27, which meshes with a small gear28 having at one end thereof a tight pulley 29 and a loose pulley 30.Guide plates 31 and 32 are supported upon rods 33 and 34 from the mainframe 1, said guide plates 31 and 32 fitting against the adjacent facesof the rolls 2 and 3 to retain a body of plastic material 35 in placethereon. Near the bottom the main frame 1 supports in a pair of arms 36a shaft 37 adapted to receive a wooden bobbin 38 carrying a roll offabric such as cloth to be provided with a coating. A friction band 39extends around the shaft 37, so as to retard the unwinding of the fabricand therefore maintain it taut. From the shaft 37, the fabric is fedover a guide roll 40, supported in the arms 36, and from this point thefabric passes under a doctor blade 41, supported in arms 42 from themain frame 1, and held in position by thumb screws 43. A body of jelly44 is designed to be carried in front of the doctor blade 41, said bodyof jelly being confined in its proper' position by a pair of angleplates 45, attached by thumb screws 46, to the doctor blade 41. Fromthis point the fabric passes between the rolls 3 and 4, where itrecelves a coating of plastic material from the body of plastic material35 on top of the jelly or cemented coat previously applied by the doctor41. On thefother side of the machine there is a further pair of arms 47which support a shaft 48, carrying a wooden bobbin 49, the same as thewooden bobbin 38 already referred to. This wooden bobbin is driven bymeans of a gear 50, loosely supported upon the end of the shaft 48, andadapted to be connected more or less tightly thereto by means of anadjustable wheel 51 screw threaded on the end of the shaft 48. A trainof gears 52 conveys power to the gear 50 from the gear 26.

In the operation of the machine, a coating of jelly is first applied tothe fabric as a cement coatin and on top of this is applied a coating ofp astic. Both of these coatings may be of any suitable pyroxylincomposition adapted for this purpose. After the fabric has been coatedin this manner it is wound around'the wooden bobbin 49 under tensionobtained by proper adjustment of the end wheel 51, and the coatedfabricremains on this bobbin until the coated fabric is in proper conditionfor the next operation.

The plastic composition, when applied, still contains some volatileconstituents which must escape from the composition before the productis entirely nished. Furthermore, it will be understood that the coatingon the fabric has not yet become entirely hardened. In order tocompletely and securely anchor the coating of plastic material to thefabric, the coated fabric is wound around the shaft 48 with some degreeof pressure. The rolled up fabric is maintained in this position untilthe coating composition has thoroughly settled inv position on thefabric. The pyroxylin composition will l'then be securely and firmlyanchored to the woven fabrlc and the coating composition 'smash' itselfwill have become set in the uniform manner, so that there are not anyundue stresses in the same,

It is to be particularly understood that the machine may be operated inquite a different manner by omitting any one or more of the varioussteps in the process, and that therefore the corresponding parts of themachine may be operated alone or together with any other desired part ofthe machine, as.

desired.

While I have described my invention above in detail, I wish it to belunderstood that many changes may be made therein without departing,from the spirit of my invention.

I claim: 1. In combination, three rolls, means for supplying a plasticbetween two of the rolls, means for feeding a fabric between one of thetwo rolls and the third roll, and a device immediately adjacent saidrolls for supplying a cement coating to said fabric which remainsundried upon said fabric when passing between said rolls, lwhereby saidplastic is firmly united to said fabric by said cement coating.

2. In combination, three rolls, means for supplying a plastic betweentwo of the rolls, means for feeding a fabric between one ofthe two rollsand the third roll, a device immediately adjacent said rolls forsupplying a cement coating to said fabric which remains undried uponsaid fabric when passing between said rolls, and gearing for driving therolls at the same or different relative rates of speed.

In testimony that I claim the foregoing I have hereuntoset my hand.

CHARLES ELWOOD ARNOLD. Witnesses: i

P. E. STRICKLAND, R. H. RAWLEIGH.

